Sunk in sand and sea

I am new here and need some advice. I have a 2007 Grizzly 700 that I used to pull my boat and trailer out of the sea. Unfortunately the Grizzly ended up sunk down in the sand and saltwater until some friends could help me get it out. I am wondering if anyone has any advice for what I should do or check that could have been damaged. I already had to replace the water pump seals as the oil seal may have got saltwater on it and it deteriorated. I am just trying to be proactive and need to know what I should look for that could have been damaged. Thank you for your help.